Apparatus for eliminating dents in tubes or pipes



`1g 1,623,657 April 5* 27 L. E. BROWN APPARATUS FRBLIMINATING DENTS INTUBES OR PIPES Filed sept, 17, 1926 2 Sheets-Sheet 1A April 5, 1927.-1,623,657

L. E. BROWN APPARATUS FOR ELIMINATING DENTS IN'TUBES 0R PIPES InventorC1" "o, o raww,

Aitorney The portion of' the pipe 26 between the reservoir 23 and theeut ofic valve 27 is connected with the portion of the pipe 28 in rearof the non-return lvalve 29 through the medium or' a pipe 30 in which isa non-return valve 31 designed to open in the direction indicated by thearrow adjacent thereto.

The preferred embodiment of my invention is readily portable, and itwill be understood that in .the practical use of the apparatus the saidrunner or shoe 3 and the parts thereon are moved endwise into a tubingor pipe 1 having a dent 2 until the plunger 18 indicates that theplunger head 9 is positioned below the dent to be eliminated. Upon thesaid accurate positioning of the plunger head 9, the valve 27 is closedand by manipulation of the hand lever 22, the pump piston 21 is actuatedto force the fluid into the pipe 24 and to the chamber in the pedestal4. The pressure built up in the manner described will bring about strongupward movement of the plunger 6 and the plunger head 9, with the resultthat the dent will be moved upwardly and will be eliminated and theinterior of the tube or casing 1 will be restored to even diameterthroughout its length.

1t will be appreciated from the foregoing that my novel. apparatus isadapted to be used lwith facility, and that it is susceptible of beingoperated with but little effort and is capable of removing dents fromcasings or tubes such as 1 without subjecting the casing or tubes to anyinjury whatsoever.

It will alsobe appreciated that my novel apparatus is free of delicateparts such as are likely to get out oi' order after a short period ofuse, and in this connection it will be understood that the operation ofthe springs12 and 13 in lowering the plunger 6 serves to bring` aboutthe return of the oil or other fluid employed through the pipe 24 to theoil reservoir 23, the valve 27 being reopened for said purpose.

I have entered into the detailed description of the construction andrelative arrangement of the parts embraced in the present and preferredembodiment of my -invention in order to impart a full, clear and exactunderstanding of the said embodiment. I do not desire, however, to beunderstood as limiting myself to the structure disclosed, my inventionbeing defined by my appended claims within the scope of which structuralchanges or modifications may be made without affecting or involvingdeparture from my invention.

Having t-hus described the invention, what I claim as new and desire tosecure by Letters Patent is 1. An apparatus for eliminating dents fromtubes, pipes and the like comprising a shoe yor runner having apedestal,said pedestal being chamb'ered, a plunger Vmovable in the chamber of thepedestal, mcansior supplying fluid under pressure to the chamber belowthe plunger, and a pointer connected with the shoe or runner and adaptedto operate exteriorly of a pipe, tube, or the like to indicate theposition of the plunger within the pipe, tube, or the like.

2. An apparatus for eliminating dents from tubes, pipes and the likecomprising a shoe or runner having a pedestal, said pedestal beingchambered, a plunger movable in the chamber of the pedestal, means forsupplying fluid under pressure to the chamber below the plunger, and apointer connected with the shoe or runner and adapted to operateexteriorly oi a pipe, tube, or the like to indicate the position of theplunger within the pipe, tube, or the like; the plunger being equippedwith a removable head, and means for detachably retaining the head inworking position on the plunger.

3. An apparatus i'or eliminating dents from tubes, pipes and the likecomprising a shoe or runner having a pedestal, said pedestal beingchambered, a plunger movable in the chamber of the pedestal, means forsupplying fluid und-er pressure to the chamber below the plunger, apointe) connected with the shoe or runner and adapted to operateexteriorly of a pipe, tube, or

the like to indicate the position of the plunger within the pipe, tube,or the like, a stop on the bar, and a pointer pivotally connected tosaid bar and adapted to bring up against said stop. l

4. An apparatus for eliminating dents from tubes, pipes and the likecomprising a shoe or runner having a pedestal, said pedestal beingchambered, a plunger movable in the chamber of the pedestal, means forsupplying fluid under pressure to the chamber below the plunger, apointer connected with the shoe or runner and adapted to operateexteriorly ot a pipe, tube, or the like to indicate the position of theplunger within the pipe, tube, or the like and spring means forreturning the plunger to normal position when pressure is relieved belowthe plunger.

5. An apparatus for removing dents from pipes, tubes, and ythe. like,comprising a plunger, means carrying the plunger and adapted to bepositioned within a tube or pipe, and means for supplying fiuid underpressure to the plunger carryingr means for the purpose of forcing theplunger outwardly against a dent forthc elimination of the latter; thesaid` plunger heilig equipped with means for retracting the same whenpressure is released at the inner end of the plunger.

6. Means for eliminating-dents in tubes, pipes and the like comprising aplunger, means-carrying the plunger and-adapted to be introduced into atube' or pipe, means for supplying iiuid under pressure to the plungercarrying means, and a kpointer adapted to operate exteriorly of a tubeor pipe and connected and movable with the plunger carrying means andadapted to indicate exteriorly of a tube or pipe the position oi' theplunger within the tube or pipe.

7. An apparatus for eliminating dents from pipes, tubes, and the like,comprising plunger carrying means adapted to be introduced intubes,pipes, and the like, a plunger in said Carrying means, spring means forr-etracting the plunger, a pump, a ,conduit connecting the pump and' theplunger carrying means, a reservoir for oil or other fluid, a pipebetween said reservoir and the first named pipe and provided with a cutoff valve, aV non-return valve in theV lirst named pipe back of the pipein connection with the reservoir, said valve arranged to open toward theplunger carrying means, and a pipe` between the first named pipe and thenon-return Valve therein, back y of said non-return Valvey andthe pipebetween the reservoir. and the lirst named pipe at a point between thereservoir and the cut off Valve and having a non-return valve arrangedto open in a direction toward the first named pipe, a bar connecting thepump and the plunger carrying means, said bar adapted to enter a tube orpipe, and a second bar connected with the iirst named bar and equippedwith a pointer adapted to operate eXteriorly of a tube or pipe toindicate the position ofthe plunger within the tube or pipe. p

8. An apparatus for eliminating dents from pipes, tubes, and the like,comprising plunger carrying means adapted to be introducedin tubes,pipes, and the like, a

plunger in said carryingV means, means for retracting the plunger', apump, a conduit connecting thefpump and the plunger .carrying means, areservoir for oil or other fluid, a pipe between said reservoir and thelirst named pipe and provided with a out oitI valve, a non-return valvein the rst named pipe back of the pipe in connection with the reservoir,said valve arranged to open toward the plunger carrying means, and apipe between the first named pipe and the non-return Valve therein,backof said non-return valve and the pipe between the reservoir and thefirst named pipe at a point between the reservoir and the cut orf valveand having a non-return valve arranged to open in a direction toward thelirst named pipe, a bar connecting the pump and the plunger carryingmeans, to enter a tube or pipe, and a second bar connected with thefirst knamed bar and equipped with a pointer adapted to operateeXteriorly of a tube or pipe to indicate the position of the plungerwithin the tube or pipe; the said spring means for retracting sprin gvsaid bar adapted (ifi the plunger including a bolt spring, retractilesprings connected with the plunger and the plunger carrying means.

9. AnV apparatus for eliminating dents from pipes, tubes, a plungeradapted to be introduced into a tube or pipe to a position opposite thedent to be removed, and means for forcing the plunger outwardly againstthe said dent, in

combination with a pointer connected with 7" the plunger and adapted tooperate exteriorly of a tube or pipe to indicate the position of theplunger within the tube or pipe. In testimony whereof I afIiX mysignature.

LUTHER E. BROWN.

and the like, comprising

